There are a only few extant cases of female San-shin artworks, or a male-female pair, less than ten-percent of my collection of 600.  Almost all of them were found at just three mountains: Su-rak-san of Seoul, Kye-ryong-san near Daejeon City, and on the slopes of the great Cheon-hwang-bong on the eastern end of Jiri-san (see pages 37-40 of my First Edition).   The most famous one is at Sam-shin-bong Ssang-gye-sa just south of Cheon-hwang-bong where the San-shin is depicted in a painting as a matronly woman (shown on page 37).
Jiri-san Cheon-hwang-bong Seong-mo-halmae San-shin
[Exquisite-Wisdom Mountain Heavenly-King Peak
Holy-Mother Grandma Mountain-spirit]
Indeed, the Jiri-san Cheon-hwang-bong Seong-mo-halmae San-shin [Exquisite-Wisdom Mountain Heavenly-King Peak Holy Mother Grandma Mountain-spirit] is the most important and influential female San-shin in all of Korea, and has few superiors among all Korean deities.   Some regard Jiri-san as manifesting one female San-shin, but others hold that there are really two, a mated couple: the Cheon-hwang [Heavenly-King, name of a major guardian] is the husband, and Seong-mo-halmae [Holy Matriarch] is his wife; some temples there now feature a San-shin-gak with a matched pair of male & female San-shin taeng-hwa paintings and/or statues.
Whichever the case, Jiri's San-shin is said to have seven or eight daughters, enlightened shamanic women who are responsible for the development of indigeonous culture all over Korea (this motif is shared by the Daoist deities Ok-hwang-sangje or "Jade Upper Emperor" of Heaven and the Yong-wang or "Dragon King" of the waters).  It has been respected, praised and supplicated by common folk, aristocrats and kings from the early Shilla Kingdom up until the present day.
He claims to have spent more than a decade searching the steep, thickly-forested gullies for it, finally recovering it in 1987.  He cemented it into a boulder-base at his temple for security, and has built a large praying area in front of it.  Provincial government officials investigated it and confirmed its authenticity.  They designated it Kyeongsang-namdo Folklore Material #14, and set up a signboard reading:
                    "THE HOLY MOTHER OF MT. JIRI-SAN:
From Ancient times native folk beliefs have regarded this figure as a goddess who could communicate with both Heaven and Earth.  It is the patron of Mt. Jiri-san. 
       There are references to the Holy Mother in many historic documents and literature; for example, in the
Survey of the Geography of Korea [Tungguk Yoji-songnam] compiled in the 15th century and Yi Nung-hwa's History of Buddhism written in the early 20th century.  Seo Ko-jong, a late 15th century scholar, noted in his Anthology of Korean Literature that monk Toson (827-899) [this would be Doseon-daesa, a great geomancer and meditation-master who assisted the foundation of the Goryeo Dynasty] prayed to the "Heavenly Queen Holy Mother, the mistress of Mt. Jiri-san."  It is also recorded that Kim Jong-jik, an outstanding Neo-Confucian scholar of the 15th century, visited the shrine of the Holy Mother on top of Cheon-hwang-bong Peak and prayed for good weather."
{stylistic corrections made by myself}.
the San-shin taeng-hwa painting of Cheon-hwang-sa Temple, new home of the Holy Mother statue. Having two tigers in it is fairly unusual (often indicating two equal San-shin's), and having a Buddhist Bodhisattva standing on one of them
is unique.  The artist may have intended the standard male San-shin here as the Cheon-hwang San-shin (husband), and the Bodhisattva figure as the Seong-mo (wife).
There was a shrine built on Cheon-hwang-bong [1915 meters, southern Korea's highest peak] long ago, containing a simple granite statue of Seong-mo-halmae San-shin.  It is just less than one meter tall, and depicts a broad-faced woman, seated cross-legged in the Korean style with her hands clasped (as if in prayer of respect) in front of her heart.  Its age is unknown, but by looking at it I guessed a thousand years.  The shrine was torn down and the statue thrown off the peak to tumble down into a wilderness valley, in the 1970's.  The abbot of Cheon-hwang-sa Temple at the southern foot of Cheon-hwang-bong (in an obscure side-valley of the Beob-gye-sa ipgu area, a major trailhead) says that this was done by a group of Korean Christian fanatics. 
the original statue of the Holy Matriarch, now safely enshrined
at Cheon-hwang-sa Temple.